Figure 2. Two types of tone burst waves. Normal stimuli: A, B, consisting of a 5-msec duration with a sound gate of 1 msec. Our stimuli: C, D, consisting of a 1-msec duration with a sound gate of 0.1 msec. Both stimuli presentation timing is 21 times/sec, and configuration number average is 500.

Figure 3. Example of an ABR wave form measured in a ICR mouse. Using a sound-attenuating RF field chamber and a short-tone burst sound resulted in a clearly defined wave. The hearing threshold is calculated from the latency to wave I, the length of the wave pattern and distance between the top and bottom of each wave.